1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* Copyright (c) 2015 Joerg Jung <jung@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* portable fgetln() version, NOT reentrant
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "compat.h"
char *
fgetln(FILE *fp, size_t *len)
{
static char *buf = NULL;
static size_t bufsz = 0;
size_t r = 0;
char *p;
int c, e;
if (!fp || !len) {
errno = EINVAL;
return NULL;
}
if (!buf) {
if (!(buf = calloc(1, BUFSIZ)))
return NULL;
bufsz = BUFSIZ;
}
while ((c = getc(fp)) != EOF) {
buf[r++] = c;
if (r == bufsz) {
if (!(p = reallocarray(buf, 2, bufsz))) {
e = errno;
free(buf);
errno = e;
buf = NULL, bufsz = 0;
return NULL;
}
buf = p, bufsz = 2 * bufsz;
}
if (c == '\n')
break;
}
return (*len = r) ? buf : NULL;
}
|
